call_by_value.c

#include<stdio.h>
    void swap(int x, int y)
    {
    int temp;
    temp=x;
    x=y;
    y=temp;
    }
    void main()
    { 
    int r=10, v=20; 
    swap(r, v);  // passing value to function
    printf("\nValue of r: %d",r);
    printf("\nValue of v: %d",v);
    }